1988-1991 Yamaha Sno Scoot SV 80/E Snowmobile Service Manual, Page 55Get this manual
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KICK STARTER 1 Remove: Kick crank CD
COl MAGNETO
1 Remove: Nut CD (Rotor)
Hold the rotor (COl magneto) by the Rotor Holder (YU-01235) to loosen the nut